[Bug middle-end/61409] [5/6/7 regression] -Wmaybe-uninitialized false-positive with -O2

[aldyh at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=61409

--- Comment #21 from Aldy Hernandez <aldyh at gcc dot gnu.org> ---
Created attachment 39487
  --> https://gcc.gnu.org/bugzilla/attachment.cgi?id=39487&action=edit
even more^2 reduced testcase

Smaller testcase without any structure nonsense and even less variables.